This Massive Robot Could Soon Join Marines on the Battlefield
November 21 2013 DARPA built the LS3 to act as an autonomous pack horse that "can carry 400 lbs of a squad’s load, follow squad members...
https://downf33d.blogspot.com/2013/11/this-massive-robot-could-soon-join.html
November 21 2013
DARPA built the LS3 to act as an autonomous pack horse that "can carry 400 lbs of a squad’s load, follow squad members through rugged terrain and interact with troops in a natural way, similar to a trained animal and its handler."
From Defense One